National Public Radio: In the hill country of eastern Tennessee, residents of the town of Kingston surveyed the vast spread of 5.4 million cubic yards of wet coal ash that swamped a dozen homes and hundreds of acres in their community on Monday. The sludge, waste from the Tennessee Valley Authority’s coal-burning Kingston Fossil Plant, spilled out of an earth dam, and work crews are still struggling with the mess. Near the site of the spill, big yellow earth movers and back hoes and dump trucks are busy as …